As a kid I was given a well used vintage Navy marked fighting knife, don't recall if it was Kabar mfg'd or not. But you'd have called it a kabar. I want to say it was marked in the 40s.

There was a break/chip from the fuller to the spine an inch or two long.

Cannot imagine how it got there, the blade was very thick.

Of course it was unappreciated, thrown, steel wooled, and ultimately forgotten/lost. Instead, I wanted the AF survival knife in the then brand new whole earth catalog. And an AR-7, also in the catalog. And the girl on page 137! I did not want much as a preteen! Lost the knife, but still have that catalog!

That and the fact it was marked Navy... uncool